primer bulb location

[jbosch]

Is it true that a primer bulb should never be mounted with the arrow pointing downward? On my setup which is an 18' C-hawk center console with a 115 e-tec, I have two primer bulbs in the fuel line. The tank is located under the console above the floor. The first primer bulb is located about 18-20" downstream of the pickup on the tank, but is pointed downward. The second bulb is located between the fuel/water separator and the engine, and is pointed straight up. The bulb by the engine stays a lot harder, and the one by the tank (pointed down) will get much softer if i shut the engine down. I installed a temporary clear 3/8 tube right off the pickup to see if I was sucking air from the pickup. When running, there's no air bubble, but once I shut down, an air bubble makes it's way from the first primer bulb off the tank into the clear section of hose which is the highest point in the line. I have read that installing a primer bulb with the arrow pointed down will cause the check valves to malfunction. Can I just get rid of the primer by the tank all together?

Thanks

[rickdb1]

I have found that having the arrow pointing in an upward direction helps when pumping up the bulb. No reason to have 2 bulbs inline. I would keep the one by the tank and lose the one between the separator and the engine. See if you can reposition it so that it's either level or slightly pointed up. Best to have your bulb close to the tank and before the separator/filter. This helps fill the filter when you pump the bulb as you are "Pushing" fuel into it rather than "Pulling" fuel into it with one after the filter...